Hi everyone.
I am new to this forum. I've just completed my C&G level 2 qualification and started on level 3.
Next week i plan to install a garage supply from the CU in the house to the two way CU in the garage.
I planned everything all wiring diagrams, layout and about to do a product list. The job will be tested by a competent person as soon as i finish it.
But before i start the job i wanted to make sure that everything is correct and need an advice on RCDs in this installation.
It's a TN-S system.
There is an old type metal consumer unit as you can see on the pic.
The supply to the garage CU is by 4mm SWA burried underground and properly terminated at both ends. The earthing will be extended to the garage from the house.
PVC 2 way CU in the garage supplying:
1) Lighting circuit 4x100w bulbs protected by 6A MCB
2)Radial socket circuit supplying 2x double sockets and a fused switch for a 200W pond pump protected by 20A (sockets will be used occasionaly for Power Tools such as hammer drill and circular saw
Cables:
1)1.5mm flat T&E clipped direct for lighting
2)2.5 mm flat T&E clipped direct for Radial
The questions is:
1) Should i add 20 MCB on non RCD side in the main CU and have a 30mA RCD in the garage connected to it?
or
2) supply the garage from existing 60A RCD and have a main switch with 6,20A MCBs in the garage (which will be easier and cost effective)
The outbuilding is only 5m away from the house.
Any advice and information much appreciated.
Regards,
Rufat
I am new to this forum. I've just completed my C&G level 2 qualification and started on level 3.
Next week i plan to install a garage supply from the CU in the house to the two way CU in the garage.
I planned everything all wiring diagrams, layout and about to do a product list. The job will be tested by a competent person as soon as i finish it.
But before i start the job i wanted to make sure that everything is correct and need an advice on RCDs in this installation.
It's a TN-S system.
There is an old type metal consumer unit as you can see on the pic.
The supply to the garage CU is by 4mm SWA burried underground and properly terminated at both ends. The earthing will be extended to the garage from the house.
PVC 2 way CU in the garage supplying:
1) Lighting circuit 4x100w bulbs protected by 6A MCB
2)Radial socket circuit supplying 2x double sockets and a fused switch for a 200W pond pump protected by 20A (sockets will be used occasionaly for Power Tools such as hammer drill and circular saw
Cables:
1)1.5mm flat T&E clipped direct for lighting
2)2.5 mm flat T&E clipped direct for Radial
The questions is:
1) Should i add 20 MCB on non RCD side in the main CU and have a 30mA RCD in the garage connected to it?
or
2) supply the garage from existing 60A RCD and have a main switch with 6,20A MCBs in the garage (which will be easier and cost effective)
The outbuilding is only 5m away from the house.
Any advice and information much appreciated.
Regards,
Rufat
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